NSC LP2987IMX-3.3, LP2987IMX-3.0, LP2987IMMX-5.0, LP2987IMMX-3.3, LP2987IMMX-3.0 Datasheet

LP2987/LP2988
Micropower, 200 mA Ultra Low-Dropout Voltage
Regulator with Programmable Power-On Reset Delay;
Low Noise Version Available (LP2988)

General Description

The LP2987/8 are fixed-output 200 mA precision LDO volt­age regulators with power-ON reset delay which can be
implemented using a single external capacitor.

The LP2988 is specifically designed for noise-critical appli­cations. Asingle external capacitor connected to the Bypass
pin reduces regulator output noise.

Using an optimized VIP

™

(Vertically Integrated PNP) pro-

cess, these regulators deliver superior performance:
Dropout Voltage:180mV

@

200 mAload,and1mV@1mA

load (typical).
Ground Pin Current: 1mA

@

200 mA load, and 200 µA

@

10 mA load (typical).
Sleep Mode: The LP2987/8 draws less than 2 µA quiescent

current when shutdown pin is held low.
Error Flag/Reset: The error flag goes low when the output

drops approximately 5%below nominal. This pin also pro­vides a power-ON reset signal if a capacitor is connected to
the DELAY pin.

Precision Output: Standard product versions of the LP2987
and LP2988 are available with output voltages of 5.0V, 3.8V,

3.3V, 3.2V, 3.0V, or 2.8V, with guaranteed accuracy of 0.5

%

(“A” grade) and 1%(standard grade) at room temperature.

Features

n Ultra low dropout voltage
n Power-ON reset delay requires only one component
n Bypass pin for reduced output noise (LP2988)
n Guaranteed continuous output current 200 mA
n Guaranteed peak output current

>

250 mA

n SO-8 and mini SO-8 surface mount packages

n

<

2 µA quiescent current when shutdown

n Low ground pin current at all loads
n 0.5%output voltage accuracy (“A” grade)
n Wide supply voltage range (16V max)
n Overtemperature/overcurrent protection
n −40˚C to +125˚C junction temperature range

Applications

n Cellular Phone
n Palmtop/Laptop Computer
n Camcorder, Personal Stereo, Camera

Block Diagrams

VIP™is a trademark ofNational Semiconductor Corporation.

DS100017-1

DS100017-2

March 1999

LP2987/LP2988 Micropower, 200 mA Ultra Low-Dropout Voltage Regulator with Programmable

Power-On Reset Delay

© 1999 National Semiconductor Corporation DS100017 www.national.com

Connection Diagram (LP2987)

Ordering Information (LP2987)

TABLE 1. Package Marking and Ordering Information

Output Voltage Grade Order Information Package Marking Supplied as:

5 A LP2987AIMMX-5.0 L44A 3.5k Units on Tape and Reel
5 A LP2987AIMM-5.0 L44A 250 Units on Tape and Reel
5 STD LP2987IMMX-5.0 L44B 3.5k Units on Tape and Reel
5 STD LP2987IMM-5.0 L44B 250 Units on Tape and Reel

3.8 A LP2987AIMMX-3.8 L96A 3.5k Units on Tape and Reel

3.8 A LP2987AIMM-3.8 L96A 250 Units on Tape and Reel

3.8 STD LP2987IMMX-3.8 L96B 3.5k Units on Tape and Reel

3.8 STD LP2987IMM-3.8 L96B 250 Units on Tape and Reel

3.3 A LP2987AIMMX-3.3 L43A 3.5k Units on Tape and Reel

3.3 A LP2987AIMM-3.3 L43A 250 Units on Tape and Reel

3.3 STD LP2987IMMX-3.3 L43B 3.5k Units on Tape and Reel

3.3 STD LP2987IMM-3.3 L43B 250 Units on Tape and Reel

3.2 A LP2987AIMMX-3.2 L66A 3.5k Units on Tape and Reel

3.2 A LP2987AIMM-3.2 L66A 250 Units on Tape and Reel

3.2 STD LP2987IMMX-3.2 L66B 3.5k Units on Tape and Reel

3.2 STD LP2987IMM-3.2 L66B 250 Units on Tape and Reel

3.0 A LP2987AIMMX-3.0 L42A 3.5k Units on Tape and Reel

3.0 A LP2987AIMM-3.0 L42A 250 Units on Tape and Reel

3.0 STD LP2987IMMX-3.0 L42B 3.5k Units on Tape and Reel

3.0 STD LP2987IMM-3.0 L42B 250 Units on Tape and Reel

2.8 A LP2987AIMMX-2.8 L89A 3.5k Units on Tape and Reel

2.8 A LP2987AIMM-2.8 L89A 250 Units on Tape and Reel

2.8 STD LP2987IMMX-2.8 L89B 3.5k Units on Tape and Reel

2.8 STD LP2987IMM-2.8 L89B 250 Units on Tape and Reel
5 A LP2987AIMX-5.0 2987AIM5.0 2.5k Units on Tape and Reel
5 A LP2987AIM-5.0 2987AIM5.0 Shipped in Anti-Static Rails
5 STD LP2987IMX-5.0 2987IM5.0 2.5k Units on Tape and Reel
5 STD LP2987IM-5.0 2987IM5.0 Shipped in Anti-Static Rails

3.8 A LP2987AIMX-3.8 2987AIM3.8 2.5k Units on Tape and Reel

3.8 A LP2987AIM-3.8 2987AIM3.8 Shipped in Anti-Static Rails

3.8 STD LP2987IMX-3.8 2987IM3.8 2.5k Units on Tape and Reel

3.8 STD LP2987IM-3.8 2987IM3.8 Shipped in Anti-Static Rails

3.3 A LP2987AIMX-3.3 2987AIM3.3 2.5k Units on Tape and Reel

3.3 A LP2987AIM-3.3 2987AIM3.3 Shipped in Anti-Static Rails

Surface Mount Packages:

Mini SO-8 Package Type MM: See NS Package Drawing Number MUA08A

SO-8 Package Type M: See NS Package Drawing Number M08A

DS100017-3

Top View

For ordering information, refer to

Table 1

in this document.

www.national.com 2

Ordering Information (LP2987) (Continued)

TABLE 1. Package Marking and Ordering Information (Continued)

Output Voltage Grade Order Information Package Marking Supplied as:

3.3 STD LP2987IMX-3.3 2987IM3.3 2.5k Units on Tape and Reel

3.3 STD LP2987IM-3.3 2987IM3.3 Shipped in Anti-Static Rails

3.2 A LP2987AIMX-3.2 2987AIM3.2 2.5k Units on Tape and Reel

3.2 A LP2987AIM-3.2 2987AIM3.2 Shipped in Anti-Static Rails

3.2 STD LP2987IMX-3.2 2987IM3.2 2.5k Units on Tape and Reel

3.2 STD LP2987AIM-3.2 2987IM3.2 Shipped in Anti-Static Rails

3.0 A LP2987IMX-3.0 2987AIM3.0 2.5k Units on Tape and Reel

3.0 A LP2987AIM-3.0 2987AIM3.0 Shipped in Anti-Static Rails

3.0 STD LP2987IMX-3.0 2987IM3.0 2.5 Units on Tape and Reel

3.0 STD LP2987IM-3.0 2987IM3.0 Shipped in Anti-Static Rails

2.8 A LP2987AIMX-2.8 2987AIM2.8 2.5 Units on Tape and Reel

2.8 A LP2987AIM-2.8 2987AIM2.8 Shipped in Anti-Static Rails

2.8 STD LP2987IMX-2.8 2987IM2.8 2.5 Units on Tape and Reel

2.8 STD LP298AIM-2.8 298AIM2.8 Shipped in Anti-Static Rails

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Connection Diagram (LP2988)

Ordering Information (LP2988)

TABLE 2. Package Marking and Ordering Information

Output Voltage Grade Order Information Package Marking Supplied as:

5 A LP2988AIMMX-5.0 L51A 3.5k Units on Tape and Reel
5 A LP2988AIMM-5.0 L51A 250 Units on Tape and Reel
5 STD LP2988IMMX-5.0 L51B 3.5k Units on Tape and Reel
5 STD LP2988IMM-5.0 L51B 250 Units on Tape and Reel

3.8 A LP2988AIMMX-3.8 L0AA 3.5k Units on Tape and Reel

3.8 A LP2988AIMM-3.8 L0AA 250 Units on Tape and Reel

3.8 STD LP2988IMMX-3.8 L0AB 3.5k Units on Tape and Reel

3.8 STD LP2988IMM-3.8 L0AB 250 Units on Tape and Reel

3.3 A LP2988AIMMX-3.3 L50A 3.5k Units on Tape and Reel

3.3 A LP2988AIMM-3.3 L50A 250 Units on Tape and Reel

3.3 STD LP2988IMMX-3.3 L50B 3.5k Units on Tape and Reel

3.3 STD LP2988IMM-3.3 L50B 250 Units on Tape and Reel

3.2 A LP2988AIMMX-3.2 L67A 3.5k Units on Tape and Reel

3.2 A LP2988AIMM-3.2 L67A 250 Units on Tape and Reel

3.2 STD LP2988IMMX-3.2 L67B 3.5k Units on Tape and Reel

3.2 STD LP2988IMM-3.2 L67B 250 Units on Tape and Reel

3.0 A LP2988AIMMX-3.0 L49A 3.5k Units on Tape and Reel

3.0 A LP2988AIMM-3.0 L49A 250 Units on Tape and Reel

3.0 STD LP2988IMMX-3.0 L49B 3.5k Units on Tape and Reel

3.0 STD LP2988IMM-3.0 L49B 250 Units on Tape and Reel

2.8 A LP2988AIMMX-2.8 L0IA 3.5k Units on Tape and Reel

2.8 A LP2988AIMM-2.8 L0IA 250 Units on Tape and Reel

2.8 STD LP2988IMMX-2.8 L0IB 3.5k Units on Tape and Reel

2.8 STD LP2988IMM-2.8 L0IB 250 Units on Tape and Reel
5 A LP2988AIMX-5.0 2988AIM5.0 2.5k Units on Tape and Reel
5 A LP2988AIM-5.0 2988AIM5.0 Shipped in Anti-Static Rails
5 STD LP2988IMX-5.0 2988IM5.0 2.5k Units on Tape and Reel
5 STD LP2988IM-5.0 2988IM5.0 Shipped in Anti-Static Rails

3.8 A LP2988AIMX-3.8 2988AIM3.8 2.5k Units on Tape and Reel

3.8 A LP2988AIM-3.8 2988AIM3.8 Shipped in Anti-Static Rails

3.8 STD LP2988IMX-3.8 2988IM3.8 2.5k Units on Tape and Reel

3.8 STD LP2988IM-3.8 2988IM3.8 Shipped in Anti-Static Rails

3.3 A LP2988AIMX-3.3 2988AIM3.3 2.5k Units on Tape and Reel

3.3 A LP2988AIM-3.3 2988AIM3.3 Shipped in Anti-Static Rails

Surface Mount Packages:

Mini SO-8 Package Type MM: See NS Package Drawing Number MUA08A

SO-8 Package Type M: See NS Package Drawing Number M08A

DS100017-16

Top View

For ordering information, refer to

Table 2

in this document.

www.national.com 4

Ordering Information (LP2988) (Continued)

TABLE 2. Package Marking and Ordering Information (Continued)

Output Voltage Grade Order Information Package Marking Supplied as:

3.3 STD LP2988IMX-3.3 2988IM3.3 2.5k Units on Tape and Reel

3.3 STD LP2988IM-3.3 2988IM3.3 Shipped in Anti-Static Rails

3.2 A LP2988AIMX-3.2 2988AIM3.2 2.5k Units on Tape and Reel

3.2 A LP2988AIM-3.2 2988AIM3.2 Shipped in Anti-Static Rails

3.2 STD LP2988IMX-3.2 2988IM3.2 2.5k Units on Tape and Reel

3.2 STD LP2988IM-3.2 2988IM3.2 Shipped in Anti-Static Rails

3.0 A LP2988AIMX-3.0 2988AIM3.0 2.5k Units on Tape and Reel

3.0 A LP2988AIM-3.0 2988AIM3.0 Shipped in Anti-Static Rails

3.0 STD LP2988IMX-3.0 2988IM3.0 2.5 Units on Tape and Reel

3.0 STD LP2988IM-3.0 2988IM3.0 Shipped in Anti-Static Rails

2.8 A LP2988AIMX-2.8 2988AIM2.8 2.5 Units on Tape and Reel

2.8 A LP2988AIM-2.8 2988AIM2.8 Shipped in Anti-Static Rails

2.8 STD LP2988IMX-2.8 2988IM2.8 2.5 Units on Tape and Reel

2.8 STD LP2988IM-2.8 2988IM2.8 Shipped in Anti-Static Rails

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Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.

Storage Temperature Range −65˚C to +150˚C
Operating Junction

Temperature Range −40˚C to +125˚C

Lead Temperature

(Soldering, 5 seconds) 260˚C
ESD Rating (Note 2) 2 kV
Power Dissipation (Note 3) Internally Limited
Input Supply Voltage

(Survival) −0.3V to +16V

Input Supply Voltage

(Operating) 2.1V to +16V
Shutdown Pin −0.3V to +16V
Sense Pin −0.3V to +6V
Output Voltage

(Survival) (Note 4) −0.3V to +16V
I

OUT

(Survival) Short Circuit Protected

Input-Output Voltage

(Survival) (Note 5) −0.3V to +16V

Electrical Characteristics

Limits in standard typeface are for TJ= 25˚C, and limits in boldface type apply over the full operating temperature range. Un­less otherwise specified: VIN=VO(NOM) + 1V, IL= 1 mA, C

OUT

= 4.7 µF, CIN= 2.2 µF, V

S/D

= 2V.

Symbol Parameter Conditions Typical

LM2987/8AI-X.X

(Note 6)

LM2987/8I-X.X

(Note 6)

Units

Min Max Min Max

∆V

O

Output Voltage
Tolerance

−0.5 0.5 −1.0 1.0
%

V

NOM

0.1 mA<I

L

<

200 mA −0.8 0.8 −1.6 1.6

−1.8 1.8 −2.8 2.8

Output Voltage Line
Regulation

VO(NOM) + 1V ≤ VIN≤
16V

0.007

0.014 0.014
%

/V

0.032 0.032

V

IN–VO

Dropout Voltage
(Note 7)

IL= 100 µA

1

2.0 2.0

mV

3.5 3.5

I

L

=75mA

90

120 120

170 170

I

L

= 200 mA

180

230 230

350 350

I

GND

Ground Pin Current IL= 100 µA

100

120 120

µA

150 150

I

L

=75mA

500

800 800

1400 1400

I

L

= 200 mA

1

2.1 2.1
mA

3.7 3.7

V

S/D

<

0.3V 0.05 1.5 1.5 µA

I

O

(PK) Peak Output Current V

OUT

≥ VO(NOM) − 5

%

400 250 250

mA

I

O

(MAX) Short Circuit Current RL= 0 (Steady State)

(Note 10)

400

e

n

LP2987 Output Noise
Voltage (RMS)

BW = 300 Hz to
50 kHz, V

OUT

= 3.3V

C

OUT

=10µF

100

µV(RMS)

LP2988 Output Noise
Voltage (RMS)

BW = 300 Hz to
50 kHz, V

OUT

= 3.3V

C

OUT

=10µF

C

BYPASS

= .01 µF

20

Ripple Rejection f = 1 kHz, C

OUT

=10µF

C

BYP

=

0 (LP2988)

65 dB

Output Voltage
Temperature Coefficient

(Note 9)

20 ppm/˚C

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